handle all logic in same fn

crates/api_crud/src/comment/create.rs

@@ -18,7 +18,6 @@ use lemmy_api_common::{
 use lemmy_db_schema::{
   impls::actor_language::default_post_language,
   source::{
-    actor_language::CommunityLanguage,
     comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm},
     comment_reply::{CommentReply, CommentReplyUpdateForm},
     local_site::LocalSite,
@@ -88,7 +87,6 @@ pub async fn create_comment(
     check_comment_depth(parent)?;
   }
 
-  // attempt to set default language if none was provided
   let language_id = default_post_language(
     &mut context.pool(),
     data.language_id,
@@ -97,9 +95,6 @@ pub async fn create_comment(
   )
   .await?;
 
-  CommunityLanguage::is_allowed_community_language(&mut context.pool(), language_id, community_id)
-    .await?;
-
   let comment_form = CommentInsertForm {
     language_id: Some(language_id),
     ..CommentInsertForm::new(local_user_view.person.id, data.post_id, content.clone())

crates/api_crud/src/comment/update.rs

@@ -13,8 +13,8 @@ use lemmy_api_common::{
   },
 };
 use lemmy_db_schema::{
+  impls::actor_language::default_post_language,
   source::{
-    actor_language::CommunityLanguage,
     comment::{Comment, CommentUpdateForm},
     local_site::LocalSite,
   },
@@ -55,19 +55,13 @@ pub async fn update_comment(
     Err(LemmyErrorType::NoCommentEditAllowed)?
   }
 
-    let language_id = default_post_language(
-      &mut context.pool(),
-      data.language_id,
-      community_id,
-      local_user_view.local_user.id,
-    )
-    .await?;
-    CommunityLanguage::is_allowed_community_language(
-      &mut context.pool(),
-      language_id,
-      orig_comment.community.id,
-    )
-    .await?;
+  let language_id = default_post_language(
+    &mut context.pool(),
+    data.language_id,
+    orig_comment.community.id,
+    local_user_view.local_user.id,
+  )
+  .await?;
 
   let slur_regex = local_site_to_slur_regex(&local_site);
   let url_blocklist = get_url_blocklist(&context).await?;
@@ -79,7 +73,7 @@ pub async fn update_comment(
   let comment_id = data.comment_id;
   let form = CommentUpdateForm {
     content,
-    language_id: data.language_id,
+    language_id: Some(language_id),
     updated: Some(Some(naive_now())),
     ..Default::default()
   };

crates/api_crud/src/post/create.rs

@@ -19,7 +19,6 @@ use lemmy_api_common::{
 use lemmy_db_schema::{
   impls::actor_language::default_post_language,
   source::{
-    actor_language::CommunityLanguage,
     community::Community,
     local_site::LocalSite,
     post::{Post, PostInsertForm, PostLike, PostLikeForm},
@@ -104,7 +103,6 @@ pub async fn create_post(
     .await?;
   }
 
-  // attempt to set default language if none was provided
   let language_id = default_post_language(
     &mut context.pool(),
     data.language_id,
@@ -113,11 +111,6 @@ pub async fn create_post(
   )
   .await?;
 
-  // Only need to check if language is allowed in case user set it explicitly. When using default
-  // language, it already only returns allowed languages.
-  CommunityLanguage::is_allowed_community_language(&mut context.pool(), language_id, community_id)
-    .await?;
-
   let scheduled_publish_time =
     convert_published_time(data.scheduled_publish_time, &local_user_view, &context).await?;
   let post_form = PostInsertForm {

crates/api_crud/src/post/update.rs

@@ -15,8 +15,8 @@ use lemmy_api_common::{
   },
 };
 use lemmy_db_schema::{
+  impls::actor_language::default_post_language,
   source::{
-    actor_language::CommunityLanguage,
     community::Community,
     local_site::LocalSite,
     post::{Post, PostUpdateForm},
@@ -101,19 +101,13 @@ pub async fn update_post(
     Err(LemmyErrorType::NoPostEditAllowed)?
   }
 
-    let language_id = default_post_language(
-      &mut context.pool(),
-      data.language_id,
-      community_id,
-      local_user_view.local_user.id,
-    )
-    .await?;
-    CommunityLanguage::is_allowed_community_language(
-      &mut context.pool(),
-      language_id,
-      orig_post.community_id,
-    )
-    .await?;
+  let language_id = default_post_language(
+    &mut context.pool(),
+    data.language_id,
+    orig_post.community_id,
+    local_user_view.local_user.id,
+  )
+  .await?;
 
   // handle changes to scheduled_publish_time
   let scheduled_publish_time = match (
@@ -136,7 +130,7 @@ pub async fn update_post(
     body,
     alt_text,
     nsfw: data.nsfw,
-    language_id: data.language_id,
+    language_id: Some(language_id),
     updated: Some(Some(naive_now())),
     scheduled_publish_time,
     ..Default::default()

crates/db_schema/src/impls/actor_language.rs

@@ -197,7 +197,7 @@ impl SiteLanguage {
 
 impl CommunityLanguage {
   /// Returns true if the given language is one of configured languages for given community
-  pub async fn is_allowed_community_language(
+  async fn is_allowed_community_language(
     pool: &mut DbPool<'_>,
     for_language_id: LanguageId,
     for_community_id: CommunityId,
@@ -324,10 +324,10 @@ pub async fn default_post_language(
   language_id: Option<LanguageId>,
   community_id: CommunityId,
   local_user_id: LocalUserId,
-) -> Result<LanguageId, Error> {
+) -> LemmyResult<LanguageId> {
   use crate::schema::{community_language::dsl as cl, local_user_language::dsl as ul};
   let conn = &mut get_conn(pool).await?;
-  match language_id {
+  let language_id = match language_id {
     None | Some(LanguageId(0)) => {
       let mut intersection = ul::local_user_language
         .inner_join(cl::community_language.on(ul::language_id.eq(cl::language_id)))
@@ -338,16 +338,19 @@ pub async fn default_post_language(
         .await?;
 
       if intersection.len() == 1 {
-        Ok(intersection.pop().unwrap_or(UNDETERMINED_ID))
+        intersection.pop().unwrap_or(UNDETERMINED_ID)
       } else if intersection.len() == 2 && intersection.contains(&UNDETERMINED_ID) {
         intersection.retain(|i| i != &UNDETERMINED_ID);
-        Ok(intersection.pop().unwrap_or(UNDETERMINED_ID))
+        intersection.pop().unwrap_or(UNDETERMINED_ID)
       } else {
-        Ok(UNDETERMINED_ID)
+        UNDETERMINED_ID
       }
     }
-    Some(lid) => Ok(lid),
-  }
+    Some(lid) => lid,
+  };
+
+  CommunityLanguage::is_allowed_community_language(pool, language_id, community_id).await?;
+  Ok(language_id)
 }
 
 /// If no language is given, set all languages
@@ -596,7 +599,7 @@ mod tests {
 
   #[tokio::test]
   #[serial]
-  async fn test_default_post_language() -> Result<(), Error> {
+  async fn test_default_post_language() -> LemmyResult<()> {
     let pool = &build_db_pool_for_tests().await;
     let pool = &mut pool.into();
     let (site, instance) = create_test_site(pool).await?;
@@ -619,7 +622,7 @@ mod tests {
     LocalUserLanguage::update(pool, test_langs2, local_user.id).await?;
 
     // no overlap in user/community languages, so defaults to undetermined
-    let def1 = default_post_language(pool, community.id, local_user.id).await?;
+    let def1 = default_post_language(pool, None, community.id, local_user.id).await?;
     assert_eq!(UNDETERMINED_ID, def1);
 
     let ru = Language::read_id_from_code(pool, "ru").await?;
@@ -632,7 +635,7 @@ mod tests {
     LocalUserLanguage::update(pool, test_langs3, local_user.id).await?;
 
     // this time, both have ru as common lang
-    let def2 = default_post_language(pool, community.id, local_user.id).await?;
+    let def2 = default_post_language(pool, None, community.id, local_user.id).await?;
     assert_eq!(ru, def2);
 
     Person::delete(pool, person.id).await?;